FCC ID 2BUTR-K7
Smart Lock
by Shenzhen GuangHui Intelligent Technology Co.,Ltd.
Grantee Code: 2BUTR Product Code: K7
Latest application date: 2026-02-12
FCC ID Device Details
| FCC ID | 2BUTR-K7 |
|---|---|
| Mirrors | fcc.id | gov | fccid.ai |
| Grantee Code | 2BUTR |
| Product Code | K7 |
| Applicant Business | Shenzhen GuangHui Intelligent Technology Co.,Ltd. 🇨🇳 |
| Related Domains |  cst-cb.com |
| Equipment Class | Smart Lock |
| Test Firm | Shenzhen DL Testing Technology Co., Ltd. |
Operating Frequencies
| Frequency Range | Application Purpose | Final Action Date |
|---|---|---|
| 13.56 MHz | Change in identification of presently authorized equipment. Original FCC ID: 2A9VK-L620 Grant Date: 03/22/2023 | 2026-02-12 |
| 2412-2462 MHz | Change in identification of presently authorized equipment. Original FCC ID: 2A9VK-L620 Grant Date: 03/22/2023 | 2026-02-12 |
Exhibits
| Document | Type | Available | File |
|---|---|---|---|
| user manual | Users Manual | 2026-02-12 | PDF 1.5 MB |
| External Photos | External Photos | 2026-02-12 | PDF 4.3 MB |
| Label and label locatio | ID Label/Location Info | 2026-02-12 | PDF 1.6 MB |
| USA-CoveredEquipmentLetter-Combined_V1.1 | Attestation Statements | 2026-02-12 | PDF 209.4 KB |
| USA-LocalRepLetter_V1.1 -2BUTR-K7 | Attestation Statements | 2026-02-12 | PDF 284.8 KB |
| Authorization Letter for FCC ID | Cover Letter(s) | 2026-02-12 | PDF 119.4 KB |
| Letter of Change FCC ID | Cover Letter(s) | 2026-02-12 | PDF 140.8 KB |
| Product Equality Declaration | Cover Letter(s) | 2026-02-12 | PDF 187.1 KB |
| USA-DueDigilenceLetter_V0.1 Metadata only | Operational Description | PDF 90.3 KB |
Application Information
| Application ID | bRczrNhJ4f0o0VxY91nUYw== |
|---|---|
| Final Action Date | 2026-02-12 |
| Application Purpose | Change in identification of presently authorized equipment. Original FCC ID: 2A9VK-L620 Grant Date: 03/22/2023 |
| Applicant FRN | 0037982709 |
| Model | K7 |
| Frequency Range | 13.56 MHz |
| Equipment Class | DXX - Part 15 Low Power Communication Device Transmitter |
| Device Description | Smart Lock |
| Responsible Party | Benjamin Chen, bruce@cst-cb.com , +8613352912459 |
| Non-Technical Contact | Cindy Wu, HOORAY INDUSTRY LLC, cindynewhope@gmail.com  , (626) 910-5808 |
| Test Firm | Jade Yang, Shenzhen DL Testing Technology Co., Ltd., Jade.yang@dl-cert.com  , 400-688-3552 |
| TCB Email | o.kneip@kl-certification.de  |
| TCB Scope | A1: Low Power Transmitters below 1 GHz (except Spread Spectrum), Unintentional Radiators, EAS (Part 11) & Consumer ISM devices |
| Short-Term Confidentiality | No |
| Long-Term Confidentiality | Yes |
| Modular Equipment | Does not apply |
| Composite Device | Yes |
| Cognitive Radio | No |
| Authorization Waiver | No |
| Authorization Waiver Approved | No |
| Section 5301 Certification | Yes |
| Related OET Knowledge DataBase Inquiry | No |
Applications
| Application ID | Date | Purpose |
|---|---|---|
| bRczrNhJ4f0o0VxY91nUYw== | 2026-02-12 | Change in identification of presently authorized equipment. Original FCC ID: 2A9VK-L620 Grant Date: 03/22/2023 |
| 1W+NmdV39HBHVKeZlRpA8A== | 2026-02-12 | Change in identification of presently authorized equipment. Original FCC ID: 2A9VK-L620 Grant Date: 03/22/2023 |
Grants
TCB Grant - Application bRczrNhJ4f0o0VxY91nUYw==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
KL-Certification GmbH Heinrich-Hertz-Allee 7 St. Ingbert, 66386 Germany |
Date of Grant: 02/12/2026 Application Dated: 02/12/2026 |
| Shenzhen GuangHui Intelligent Technology Co.,Ltd. |
| Building 13, Qiaoxin Garden, No. 33 |
| Guangming Community, Guangming District |
| Shenzhen, China |
| Attention: Benjamin Chen , |
| NOT TRANSFERABLE |
| EQUIPMENT AUTHORIZATION is hereby issued to the named GRANTEE, and is VALID ONLY for the equipment identified hereon for use under the Commission's Rules and Regulations listed below. |
| FCC IDENTIFIER: | 2BUTR-K7 |
| Name of Grantee: | Shenzhen GuangHui Intelligent Technology Co.,Ltd. |
| Equipment Class: | Part 15 Low Power Communication Device Transmitter |
| Notes: | Smart Lock |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| 15C | 13.56 - 13.56 |
| The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and not be co-located with any other transmitters except in accordance with FCC multi-transmitter product procedures. End-users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance. |
TCB Grant - Application 1W+NmdV39HBHVKeZlRpA8A==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
KL-Certification GmbH Heinrich-Hertz-Allee 7 St. Ingbert, 66386 Germany |
Date of Grant: 02/12/2026 Application Dated: 02/12/2026 |
| Shenzhen GuangHui Intelligent Technology Co.,Ltd. |
| Building 13, Qiaoxin Garden, No. 33 |
| Guangming Community, Guangming District |
| Shenzhen, China |
| Attention: Benjamin Chen , |
| NOT TRANSFERABLE |
| EQUIPMENT AUTHORIZATION is hereby issued to the named GRANTEE, and is VALID ONLY for the equipment identified hereon for use under the Commission's Rules and Regulations listed below. |
| FCC IDENTIFIER: | 2BUTR-K7 |
| Name of Grantee: | Shenzhen GuangHui Intelligent Technology Co.,Ltd. |
| Equipment Class: | Digital Transmission System |
| Notes: | Smart Lock |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| 15C | 2412.0 - 2462.0 | 0.02143 |
| Output power listed is conducted. This device supports 20 MHz and 40 MHz bandwidth mode. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and not be co-located with any other transmitters except in accordance with FCC multi-transmitter product procedures. End-users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance. |